Granted Patent
Utility
US 5,248,489 · App. 07/875,005
Selective removal of hydrogen sulfide over a zinc oxide and silica absorbing composition
Inventors:
Dennis R. Kidd, Gary A. Delzer, Donald H. Kubicek, Paul F. Schubert
Patented Case
View Patent ↗
Granted: Sep 28, 1993
Filed: Apr 24, 1992
Inventors
Dennis R. Kidd
Gary A. Delzer
Donald H. Kubicek
Paul F. Schubert
Assignee (at issue)
Phillips Petroleum Company
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.